Posts tagged “locking piece”

Among the many engineering details that make the MP5 family legendary, one of the least understood—but most important—components is the locking piece. While casual shooters may never think about it, this small, angled component plays a major role in how the MP5SD operates, cycles, and manages recoil. For the MP5SD specifically, the locking piece is […]

The HK MP5 family is famous for its smooth recoil, controllability, and legendary reliability. But what truly sets it apart from conventional submachine guns is its operating system: roller-delayed blowback. While many shooters have heard the term, few understand how it works—or why it delivers such a unique shooting experience. This companion post breaks down the physics of […]